Fluid bed furnaces

Patent · Tue Dec 22 00:00:00 EST 1981

OSTI ID:6449645

Dawson, H

A fluid-bed furnace has at least one combustion chamber, preferably two side-by-side, housing a bed of incombustible particulate material to be fluidized when burning fuel fed thereto. Bed fluidization is by forced release in the incombustible material of combustion promoting gas, normally air, from a plenum chamber arrangement externally of the bed proper at a side or end thereof to save overall height. Other features include the return of used exhaust gas to the bed for additional fluidizing and heating purposes; release within the bed of such returned exhaust gas at a position higher than normal combustion promoting gas; an auxiliary burner within the combustion chamber to consume fine fuel material lifted from the bed in operation; insulation of at least the normal combustion promoting gas plenum chamber externally by incombustible bed material and/or internally by refractory lining; end tapering of bed traversing gas feed pipes to reduce expansion resistance; and a removable end plug in the latter pipes to ease cleaning thereof.

• Assignee: G P Worsley and Co Ltd (United Kingdom)
• Patent Number(s): US 4306854
• OSTI ID: 6449645
• Resource Relation: Patent Priority Date: Priority date 8 Apr 1978, United Kingdom of Great Britain and Northern Ireland (UK); Other Information: PAT-APPL-027586
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
FLUIDIZED-BED COMBUSTORS
DESIGN
COMBUSTION CHAMBERS
EXHAUST RECIRCULATION SYSTEMS
MECHANICAL STRUCTURES
PIPES
COMBUSTORS
EQUIPMENT
EXHAUST SYSTEMS
POLLUTION CONTROL EQUIPMENT
320303* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Equipment & Processes